US3224739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing and kneading machine
Assignee: Shell USA Inc
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Filing: 1963-09-05
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Granted: 1965-12-21
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 Schuur Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:06
CPC Classifications
B; B01; B01F; B01F31/00; B01F31/40; B01F31/401; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/422; B29B7/423; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/455; B29C48/50; B29C48/68; B29C48/685; B29C48/687; B29C48/03; B29C48/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A MIXING AND KNEADING MACHINE WHICH COMPRISES: (A) A CASING PROVIDED WITH AT LEAST THREE PORTS WHICH INCLUDE INLET AND OUTLET PORTS AND HAVING A PLURALITY OF LONGITUDINALLY SPACED PROJECTIONS EXTENDING INWARDS, (B) A WORM SCREW MOUNTED WITHIN SAID CASING AND BEING BOTH ROTATABLE AND AXIALLY RECIPROCABLE RELATIVE TO THE CASING, SAID SCREW HAVING A WORM WHICH IS INTERRUPTED AT LONGITUDINAL INTERVALS SPACED APART BY DISTANCE EQUAL TO THE LONGITUDINAL INTERVALS BETWEEN SAID PROJECTIONS TO FORM PASSAGES, WHEREBY SAID PROJECTIONS CAN PASS THROUGH SAID PASSAGES DURING SAID ROTARY AND AXIAL RECIPROCATORY MOVEMENTS OF THE SCREWS, AND (C) SAID WORM BEING WOUND IN ONE SCREW DIRECTION BETWEEN ONE PAIR OF DIFFERENT PORTS AND IN THE OTHER SCREW DIRECTION BETWEEN ANOTHER PAIR OF DIFFERENT PORTS, WHEREBY, DURING THE OPERATION OF THE MACHINE, MATERIAL SUPPLIED TO THE INLET PORT OR PORTS FLOW IN OPPOSITE DIRECTIONS WITHIN THE CASING.
Claim 2
Dependent Claim
145 words
A MIXING AND KNEADING MACHINE WHICH COMPRISES: (A) A CASING PROVIDED WITH AT LEAST THREE PORTS WHICH INCLUDE INLET AND OUTLET PORTS AND HAVING A PLURALITY OF LONGITUDINALLY SPACED PROJECTIONS EXTENDING INWARDS, (B) A WORM SCREW MOUNTED WITHIN SAID CASING AND BEING BOTH ROTATABLE AND AXIALLY RECIPROCABLE RELATIVE TO THE CASING, SAID SCREW HAVING A WORM WHICH IS INTERRUPTED AT LONGITUDINAL INTERVALS SPACED APART BY DISTANCE EQUAL TO THE LONGITUDINAL INTERVALS BETWEEN SAID PROJECTIONS TO FORM PASSAGES, WHEREBY SAID PROJECTIONS CAN PASS THROUGH SAID PASSAGES DURING SAID ROTARY AND AXIAL RECIPROCATORY MOVEMENTS OF THE SCREWS, AND (C) SAID WORM BEING WOUND IN ONE SCREW DIRECTION BETWEEN ONE PAIR OF DIFFERENT PORTS AND IN THE OTHER SCREW DIRECTION BETWEEN ANOTHER PAIR OF DIFFERENT PORTS, WHEREBY, DURING THE OPERATION OF THE MACHINE, MATERIAL SUPPLIED TO THE INLET PORT OR PORTS FLOW IN OPPOSITE DIRECTIONS WITHIN THE CASING.
References Cited (Backward Citations)
US696282A
Cited
US2731247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |